dickheadedly

Adverb

 * 1)  In a dickheaded manner.
 * 2) * 1996, Barry Dickins, "A Rugby League Reminiscence", reprinted in The Best Ever Australian Sports Writing: A 200 Year Collection (ed. David Headon), Black Inc. (2001), ISBN 9781863952668, page 363:
 * They sway, they chant, they dickheadedly do the Mexican Wave